Thomas lives rent-free in Hippo's mouth and acts like he owns the place. Every episode is them bickering like an old married couple who somehow actually need each other, the bird's scheming bouncing off the hippo's stubborn goodness until something ridiculous happens and they're back on the same side. It's a friendship that doesn't need plot or drama to work, just two characters who've figured out how to be annoyed and loyal at the exact same time.

A scheming bird named Thomas has found the perfect setup: free lodging inside the mouth of Hippo, a gentle hippopotamus who asks almost nothing in return. But Thomas isn't content with just a roof over his head. He acts like the master of the arrangement and keeps trying to outwit his simple, good-natured host. The two quarrel often, yet their underlying friendship and willingness to cooperate hold firm. This short-form comedy, produced over 300 episodes, draws its humor from the odd pairing of a crafty freeloader and the kindly giant who puts up with him.